Answer:
volume = 558 in³
Step-by-step explanation:
Area of base
Section the base into a triangle and a rectangle.
Area of a triangle = 1/2 x base x height
⇒ area = 1/2 x (7 - 4) x (12 - 8) = 6 in²
Area of a rectangle = width x height
⇒ area = 7 x 8 = 56 in²
Therefore, area of the base = 6 + 56 = 62 in²
Volume
Volume = area of the base x height
⇒ volume of the aquarium = 62 x 9 = 558 in³
